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<FONT color="green">001</FONT>    package com.barchart.udt.net;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.io.IOException;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.io.InputStream;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.nio.channels.IllegalBlockingModeException;<a name="line.5"></a>
<FONT color="green">006</FONT>    <a name="line.6"></a>
<FONT color="green">007</FONT>    import com.barchart.udt.ErrorUDT;<a name="line.7"></a>
<FONT color="green">008</FONT>    import com.barchart.udt.SocketUDT;<a name="line.8"></a>
<FONT color="green">009</FONT>    <a name="line.9"></a>
<FONT color="green">010</FONT>    /**<a name="line.10"></a>
<FONT color="green">011</FONT>     * {@link InputStream} implementation for UDT sockets.<a name="line.11"></a>
<FONT color="green">012</FONT>     */<a name="line.12"></a>
<FONT color="green">013</FONT>    public class NetInputStreamUDT extends InputStream {<a name="line.13"></a>
<FONT color="green">014</FONT>    <a name="line.14"></a>
<FONT color="green">015</FONT>            public static int EOF = -1;<a name="line.15"></a>
<FONT color="green">016</FONT>    <a name="line.16"></a>
<FONT color="green">017</FONT>            private final SocketUDT socketUDT;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>            /**<a name="line.19"></a>
<FONT color="green">020</FONT>             * <a name="line.20"></a>
<FONT color="green">021</FONT>             * @param socketUDT<a name="line.21"></a>
<FONT color="green">022</FONT>             *            The UDT socket.<a name="line.22"></a>
<FONT color="green">023</FONT>             */<a name="line.23"></a>
<FONT color="green">024</FONT>            public NetInputStreamUDT(final SocketUDT socketUDT) {<a name="line.24"></a>
<FONT color="green">025</FONT>    <a name="line.25"></a>
<FONT color="green">026</FONT>                    if (!socketUDT.isBlocking()) {<a name="line.26"></a>
<FONT color="green">027</FONT>                            throw new IllegalBlockingModeException();<a name="line.27"></a>
<FONT color="green">028</FONT>                    }<a name="line.28"></a>
<FONT color="green">029</FONT>    <a name="line.29"></a>
<FONT color="green">030</FONT>                    this.socketUDT = socketUDT;<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>            }<a name="line.32"></a>
<FONT color="green">033</FONT>    <a name="line.33"></a>
<FONT color="green">034</FONT>            @Override<a name="line.34"></a>
<FONT color="green">035</FONT>            public int read() throws IOException {<a name="line.35"></a>
<FONT color="green">036</FONT>    <a name="line.36"></a>
<FONT color="green">037</FONT>                    /*<a name="line.37"></a>
<FONT color="green">038</FONT>                     * Here's the contract from the JavaDoc on this for SocketChannel:<a name="line.38"></a>
<FONT color="green">039</FONT>                     * <a name="line.39"></a>
<FONT color="green">040</FONT>                     * A read operation might not fill the buffer, and in fact it might not<a name="line.40"></a>
<FONT color="green">041</FONT>                     * read any bytes at all. Whether or not it does so depends upon the<a name="line.41"></a>
<FONT color="green">042</FONT>                     * nature and state of the channel. A socket channel in non-blocking<a name="line.42"></a>
<FONT color="green">043</FONT>                     * mode, for example, cannot read any more bytes than are immediately<a name="line.43"></a>
<FONT color="green">044</FONT>                     * available from the socket's input buffer; similarly, a file channel<a name="line.44"></a>
<FONT color="green">045</FONT>                     * cannot read any more bytes than remain in the file. It is guaranteed,<a name="line.45"></a>
<FONT color="green">046</FONT>                     * however, that if a channel is in blocking mode and there is at least<a name="line.46"></a>
<FONT color="green">047</FONT>                     * one byte remaining in the buffer then this method will block until at<a name="line.47"></a>
<FONT color="green">048</FONT>                     * least one byte is read.<a name="line.48"></a>
<FONT color="green">049</FONT>                     * <a name="line.49"></a>
<FONT color="green">050</FONT>                     * Long story short: This UDT InputStream should only ever be created<a name="line.50"></a>
<FONT color="green">051</FONT>                     * when the SocketChannel's in blocking mode, and when it's in blocking<a name="line.51"></a>
<FONT color="green">052</FONT>                     * mode the SocketChannel read call below will block just like we need<a name="line.52"></a>
<FONT color="green">053</FONT>                     * it too.<a name="line.53"></a>
<FONT color="green">054</FONT>                     */<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>                    final byte[] data = new byte[1];<a name="line.56"></a>
<FONT color="green">057</FONT>    <a name="line.57"></a>
<FONT color="green">058</FONT>                    final int count = read(data);<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>                    assert count == 1;<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>                    return data[0];<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>            }<a name="line.64"></a>
<FONT color="green">065</FONT>    <a name="line.65"></a>
<FONT color="green">066</FONT>            @Override<a name="line.66"></a>
<FONT color="green">067</FONT>            public int read(final byte[] bytes) throws IOException {<a name="line.67"></a>
<FONT color="green">068</FONT>    <a name="line.68"></a>
<FONT color="green">069</FONT>                    return read(bytes, 0, bytes.length);<a name="line.69"></a>
<FONT color="green">070</FONT>    <a name="line.70"></a>
<FONT color="green">071</FONT>            }<a name="line.71"></a>
<FONT color="green">072</FONT>    <a name="line.72"></a>
<FONT color="green">073</FONT>            @Override<a name="line.73"></a>
<FONT color="green">074</FONT>            public int read(final byte[] bytes, final int off, final int len)<a name="line.74"></a>
<FONT color="green">075</FONT>                            throws IOException {<a name="line.75"></a>
<FONT color="green">076</FONT>    <a name="line.76"></a>
<FONT color="green">077</FONT>                    final int count = socketUDT.receive(bytes, off, off + len);<a name="line.77"></a>
<FONT color="green">078</FONT>    <a name="line.78"></a>
<FONT color="green">079</FONT>                    if (count &gt; 0) {<a name="line.79"></a>
<FONT color="green">080</FONT>                            assert count &lt;= len;<a name="line.80"></a>
<FONT color="green">081</FONT>                            return count;<a name="line.81"></a>
<FONT color="green">082</FONT>                    }<a name="line.82"></a>
<FONT color="green">083</FONT>    <a name="line.83"></a>
<FONT color="green">084</FONT>                    if (count == 0) {<a name="line.84"></a>
<FONT color="green">085</FONT>                            throw new ExceptionReceiveUDT(socketUDT.getSocketId(),<a name="line.85"></a>
<FONT color="green">086</FONT>                                            ErrorUDT.USER_DEFINED_MESSAGE, "UDT receive time out");<a name="line.86"></a>
<FONT color="green">087</FONT>                    }<a name="line.87"></a>
<FONT color="green">088</FONT>    <a name="line.88"></a>
<FONT color="green">089</FONT>                    throw new IllegalStateException("should not happen");<a name="line.89"></a>
<FONT color="green">090</FONT>    <a name="line.90"></a>
<FONT color="green">091</FONT>            }<a name="line.91"></a>
<FONT color="green">092</FONT>    <a name="line.92"></a>
<FONT color="green">093</FONT>            @Override<a name="line.93"></a>
<FONT color="green">094</FONT>            public void close() throws IOException {<a name="line.94"></a>
<FONT color="green">095</FONT>                    socketUDT.close();<a name="line.95"></a>
<FONT color="green">096</FONT>            }<a name="line.96"></a>
<FONT color="green">097</FONT>    <a name="line.97"></a>
<FONT color="green">098</FONT>            @Override<a name="line.98"></a>
<FONT color="green">099</FONT>            public int available() throws IOException {<a name="line.99"></a>
<FONT color="green">100</FONT>                    // This is the default InputStream return value.<a name="line.100"></a>
<FONT color="green">101</FONT>                    // The java/net/SocketInputStream.java implementation delegates to<a name="line.101"></a>
<FONT color="green">102</FONT>                    // the native implementation, which returns 0 on at least some OSes.<a name="line.102"></a>
<FONT color="green">103</FONT>                    return 0;<a name="line.103"></a>
<FONT color="green">104</FONT>            }<a name="line.104"></a>
<FONT color="green">105</FONT>    <a name="line.105"></a>
<FONT color="green">106</FONT>            @Override<a name="line.106"></a>
<FONT color="green">107</FONT>            public long skip(final long n) throws IOException {<a name="line.107"></a>
<FONT color="green">108</FONT>                    throw new UnsupportedOperationException("skip not supported");<a name="line.108"></a>
<FONT color="green">109</FONT>            }<a name="line.109"></a>
<FONT color="green">110</FONT>    <a name="line.110"></a>
<FONT color="green">111</FONT>            @Override<a name="line.111"></a>
<FONT color="green">112</FONT>            public synchronized void mark(final int readlimit) {<a name="line.112"></a>
<FONT color="green">113</FONT>                    throw new UnsupportedOperationException("mark not supported");<a name="line.113"></a>
<FONT color="green">114</FONT>            }<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>            @Override<a name="line.116"></a>
<FONT color="green">117</FONT>            public synchronized void reset() throws IOException {<a name="line.117"></a>
<FONT color="green">118</FONT>                    throw new UnsupportedOperationException("reset not supported");<a name="line.118"></a>
<FONT color="green">119</FONT>            }<a name="line.119"></a>
<FONT color="green">120</FONT>    <a name="line.120"></a>
<FONT color="green">121</FONT>            @Override<a name="line.121"></a>
<FONT color="green">122</FONT>            public boolean markSupported() {<a name="line.122"></a>
<FONT color="green">123</FONT>                    return false;<a name="line.123"></a>
<FONT color="green">124</FONT>            }<a name="line.124"></a>
<FONT color="green">125</FONT>    <a name="line.125"></a>
<FONT color="green">126</FONT>    }<a name="line.126"></a>




























































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